CSS Hero’s font-family widget provides a comprehensive list of built-in fonts you can choose to add your own personal touch to your theme fonts. However this list doesn’t include ALL Google Fonts but only a selection of them, in case you want to use a GF which is not listed you can still rely on a free third party plugin to add it to the loop.
First of all you’ll have to install WP Google Fonts on your current WP setup and activate it.
Once the plugin is active and running you can head to Settings > Google Fonts and add the fonts you want to use
Now just choose the fonts you want to add and the font-weights you think you may need.
Now you can manually input the name of the font in your CSS Hero font-family input field and it will automatically load.
Of course you can now choose between the font-weights you previously loaded by manually inputing the desired font-weight
Once saved Hero will store your custom Google Font and will load it in your font-family widget without you having to manually input it again.